Phosphorus forms and their distribution under long-term no tillage systems

Kai Wei, Zhenhua Chen, Xiaoping Zhang and Lijun Chen
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Kai Wei: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Zhenhua Chen: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Xiaoping Zhang: NortheastInstitute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, P.R. China
Lijun Chen: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China

Plant, Soil and Environment, 2019, vol. 65, issue 1, 35-40

Abstract: Phosphorus (P) stratification in no-tillage (NT) systems has important implications for crop growth and potential P loss, but little is known about P forms and their distribution when mineral P fertilizers are placed to the depth of 5 cm in NT soil. A 10-year field experiment was used to study the effect of NT and mouldboard plough (MP) on soil P forms at three depths (0-5, 5-10 and 10-20 cm) and their relationship with Fe and Al oxides. The results indicated that stratification of organic P forms occurred under NT treatment, and Fe oxides may have a stronger capacity for adsorbing the P forms. When mineral P fertilizers were placed to the depth of 5 cm under NT treatment, there was no significant difference in P forms or crop yield between NT and MP treatment, and orthophosphate did not show any significant difference under NT treatment between 0-5 cm and 5-10 cm depth. Overall, the agricultural management practice that mineral P fertilizers are placed to the depth of 5 cm under NT treatment could result in stratification of P forms, while the changes in the distribution of P forms in soil profiles might help reduce potential P loss in surface runoff and do not make any difference to crop growth.

Keywords: nutrient; cMonoester; cDiesters; 31P nuclear magnetic resonance; agriculture (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:1:id:270-2018-pse

DOI: 10.17221/270/2018-PSE

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